<!DOCTYPE html>
<html>
<head>
  <title>click-jacking</title>
  <script>
    var clickJacker;

    function setOpacity(opacity) {
      var matches = window.navigator.userAgent.match(/MSIE\s*(\d*)/);
      if (matches && matches.length > 1 && parseInt(matches[1]) <= 8) {
        clickJacker.style.filter = 'alpha(opacity=' + (opacity * 100) + ')';
      } else {
        clickJacker.style.opacity = opacity;
      }
    }

    function init() {
      clickJacker = document.getElementById('clickJacker');
      setOpacity(0);
    }
  </script>
</head>
<body onload="init()">
<div>
  <div id="clickJacker"
       onclick="setOpacity(1);"
       style="position:absolute;float:left;
              width:200px;height:100px; padding:10px;
              background-color:darkred;
              border:1px solid darkred;">Click jacked!</div>
  <div style="width:200px; height:100px;
              border:1px solid black; padding:10px">Click Me</div>
  <script>
    clickJacker = document.getElementById('clickJacker');
  </script>
</div>
</body>
</html>